"I remember when Joan brought me to her home town and to this amazing store."

Joanne, or Joan, his wife.

"It was called a ... Mini-mart...I think."

Your friend, Mavis Dracula, was talking about his time in Santa Cruz with his wife.

"The store had a lot of slurpee flavors! They tasted amazing!"

Being a vampire, he obviously didn't fully understand that is a completely average experience in a human convenience store.

"And there were a ton of chips there! Humans have so many snacks!"